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7620554 |
Multichannel audio extension
A method is shown for supporting a multichannel audio extension at an encoding end of a multichannel audio coding system. In order to improve the audio quality over a large frequency range, the...
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7620263 |
Anti-clipping method for image sharpness enhancement
An image processing system provides image enhancement and anti-clipping units. The anti-clipping unit for image sharpness enhancement, operates such that any shoot artifacts in the enhanced image...
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7605722 |
Lossless audio coding/decoding apparatus and method
Provided are a lossless audio coding/decoding apparatus and method. The lossless audio coding apparatus includes a first coder to directly code first symbols; a second coder module comprising a...
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7602922 |
Multi-channel encoder
There is described a multi-channel encoder ( 10; 600 ) for processing input signals conveyed in N input channels to generate corresponding output signals conveyed in M output channels together with...
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7596491 |
Layered CELP system and method
Layered (embedded) code-excited linear prediction (CELP) speech encoders/decoders with adaptive plus algebraic codebooks applied in each layer with fixed codebook pulses of one layer used in higher...
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7580893 |
Acoustic signal coding method and apparatus, acoustic signal decoding method and apparatus, and acoustic signal recording medium
Acoustic signal encoder is provided which comprises a subband filter band to divide an original signal into a plurality of frequency bands, a spectrum transformation circuit to detect the amplitude...
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7577564 |
Method and apparatus for detecting illicit activity by classifying whispered speech and normally phonated speech according to the relative energy content of formants and fricatives
Method and apparatus for the classification of speech signals. Speech is classified into two broad classes of speech production—whispered speech and normally phonated speech. Speech classified in...
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7552225 |
Enhanced media resource protocol messages
A communication system can include a telephony application server and at least one speech engine, where the system uses a standardized messaging protocol that specifies a standard for media...
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7546240 |
Coding with improved time resolution for selected segments via adaptive block transformation of a group of samples from a subband decomposition
A transform coder is described that performs a time-split transform in addition to a discrete cosine type transform. A time-split transform is selectively performed based on characteristics of...
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7536299 |
Correlating and decorrelating transforms for multiple description coding systems
Transmitters and receivers in multiple description coding systems use correlating and decorrelating transforms to generate and process multiple descriptions of elements of an input signal. The...
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7529941 |
System and method of retrieving a watermark within a signal
A system and method of retrieving a watermark in a watermarked signal are disclosed. The watermarked signal comprises odd and even overlapped blocks where the watermark is contained in the even...
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7519532 |
Transcoding EVRC to G.729ab
Transcoding from EVRC to G.729ab with LSP parameters interpolated from EVRC to G.729ab, EVRC pitch used as input to G.729ab closed-loop pitch search, and G.729ab fixed codebook pulses found from a...
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RE40691 |
Encoding decoding and compression of audio-type data using reference coefficients located within a band of coefficients
An audio type signal is encoded. The signal is first divided into bands. For each band, a yardstick signal element is selected. The yardstick may be the signal element having the largest magnitude...
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7505898 |
Method and system for masking speech
A simple and efficient method for producing an obfuscated speech signal which may be used to mask a stream of speech, is disclosed. A speech signal representing the speech stream to be masked is...
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7505897 |
Generalized Lempel-Ziv compression for multimedia signals
The subject matter includes systems, engines, and methods for generalizing a class of Lempel-Ziv algorithms for lossy compression of multimedia. One implementation of the subject matter compresses...
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7496482 |
Signal separation method, signal separation device and recording medium
A method and a device for signal separation. First, values of signals observed by M sensors are transformed into frequency domain values, and these frequency domain values are used to calculate...
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7451077 |
Acoustic presentation system and method
Complex acoustic information, such as music, is presented as visual information or as movement of an object in a manner simulating the reception of the complex acoustic information by the human...
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7447317 |
Compatible multi-channel coding/decoding by weighting the downmix channel
In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels....
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7433815 |
Method and apparatus for voice transcoding between variable rate coders
A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a...
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7418396 |
Reduced memory implementation technique of filterbank and block switching for real-time audio applications
Presented herein is a reduced memory implementation technique of filterbank and block switching for real-time audio applications. Calculation of the pulse code modulated samples from the IMDCT...
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7418394 |
Method and system for operating audio encoders utilizing data from overlapping audio segments
The time needed to encode an input audio stream is reduced by dividing the stream into two or more overlapping segments of audio information blocks, applying an encoding process to each segment to...
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7395210 |
Progressive to lossless embedded audio coder (PLEAC) with multiple factorization reversible transform
A system and method for lossless and/or progressive to lossless data coding (e.g., audio and/or image) is provided. The system and method employ a multiple factorization reversible transform...
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7386445 |
Compensation of transient effects in transform coding
The present invention provides a method for compensating transient effects in transform coding and decoding of a combined speech and audio in electronic devices by using a transform based...
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7383174 |
Method for generating and assigning identifying tags to sound files
A method of generating and assigning identifying tags to sound files according to standardized criteria that result in substantially unique tags while minimizing differences in sound files that are...
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7369989 |
Unified filter bank for audio coding
A unified filter bank for use in encoding and decoding MPEG-1 audio data, wherein input audio data is encoded into coded audio data and the coded audio data is subsequently decoded into output...
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7359854 |
Bandwidth extension of acoustic signals
A solution for improving the perceived sound quality of a decoded acoustic signal is accomplished by extending the spectrum of a received narrow-band acoustic signal (a NB ). A wide-band acoustic...
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7356465 |
Perfected device and method for the spatialization of sound
The invention relates to a computer device comprising a memory 108 for storing audio signals 114 , in part pre-recorded, each corresponding to a defined source, by means of spatial position data...
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7346498 |
Fast paired method of a 1-D cyclic convolution realization
Systems and methods are described for a fast paired method of 1-D cyclic convolution. A method includes calculating a paired transform of a signal, grouping components of the paired transform to...
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7343284 |
Method and system for speech processing for enhancement and detection
A method for discriminating noise from signal in a noise-contaminated signal involves decomposing a frame of samples of the signal into decorrelated components, and using a difference between...
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7337107 |
Perceptual harmonic cepstral coefficients as the front-end for speech recognition
Pitch estimation and classification into voiced, unvoiced and transitional speech were performed by a spectro-temporal auto-correlation technique. A peak picking formula was then employed. A...
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7328160 |
Encoding device and decoding device
An encoding device includes a transforming unit operable to extract a part of an inputted audio signal at predetermined time intervals and to transform each extracted part to produce a plurality of...
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7315822 |
System and method for a media codec employing a reversible transform obtained via matrix lifting
A system and method for encoding and/or decoding a signal, such as an audio signal, employing a reversible transform obtained via matrix lifting. This reversible transform not only converts integer...
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7310598 |
Energy based split vector quantizer employing signal representation in multiple transform domains
The invention relates to representation of one and multidimensional signal vectors in multiple nonorthogonal domains and design of Vector Quantizers that can be chosen among these representations....
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7299175 |
Normalizing to compensate for block size variation when computing control parameter values for quality and rate control for digital audio
An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and...
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7295968 |
Device and method for processing an audio signal
The invention concerns audio signal processing, comprising: a first processing of an audio source signal, using at least a mathematical transform applied on first sequences of samples obtained by...
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7269549 |
Frequency-differential encoding a sinusoidal model parameters
An encoding method is characterised by a step of encoding parameters of a given sinusoidal component in encoded frames either differentially relative to other components in the same frame or...
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7251596 |
Method and device for analyzing a wave signal and method and apparatus for pitch detection
The present invention provides a unique wave-trigon transformation (WTT) method for performing transformation process over a wave signal. The present invention also provides a pitch detecting...
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7245903 |
Wireless telephone system with programming and information service
A telecommunication system serves individual programmed instruments by wireless operation, voice dialing and, prepaid operation. The central equipment involves a multiple port wireless platform...
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7219055 |
Speech recognition apparatus and method adapting best transformation function to transform one of the input speech and acoustic model
The present invention relates to a speech recognition apparatus for recognizing speeches of a plurality of users with high accuracy. An adapting unit 12 detects a best transformation function for...
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7197453 |
System and method for optimizing the operation of an oversampled discrete Fourier transform filter bank
A system for, and method of optimizing an operation of an oversampled filter bank and an oversampled discrete Fourier transform (DFT) filter bank designed by the system or the method. In one...
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7185240 |
Apparatus and method for testing codec software by utilizing parallel processes
An apparatus for testing codec software includes a processor unit operative to execute a test program to read input data from a memory unit, to transform the input data according to transformation...
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7151802 |
High frequency content recovering method and device for over-sampled synthesized wideband signal
In a method and device for recovering the high frequency content of a wideband signal previously down-sampled, and for injecting this high frequency content in an over-sampled synthesized version...
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7133699 |
System and method for separating signals received by an overloaded antenna array
A method of separating mixed wireless signals is provided. The method includes receiving, at an antenna comprising a first quantity of antenna elements, mixed signals comprising a mixture of source...
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7124075 |
Methods and apparatus for pitch determination
Methods and apparatus for detecting periodicity and/or for determining the fundamental period of a signal such as speech. The methods include embedding a portion of a sampled digitized signal into...
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7103539 |
Enhanced coded speech
According to the invention, a method for increasing quality of an enhanced output signal to approximate an undistorted sound signal is disclosed. In one step, a distorted input signal is received...
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7103101 |
Method and system for blind Karhunen-Loeve transform coding
A method, system, and computer program product for blind Karhunen-Loeve transform (KLT) coding is disclosed, wherein KLT coefficients and possibly additional information are transmitted without...
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7089178 |
Multistream network feature processing for a distributed speech recognition system
A distributed voice recognition system and method for obtaining acoustic features and speech activity at multiple frequencies by extracting high frequency components thereof on a device, such as a...
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7089177 |
System and method for characterizing voiced excitations of speech and acoustic signals, removing acoustic noise from speech, and synthesizing speech
The present invention is a system and method for characterizing human (or animate) speech voiced excitation functions and acoustic signals, for removing unwanted acoustic noise which often occurs...
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7065485 |
Enhancing speech intelligibility using variable-rate time-scale modification
The method and preprocessor enhances the intelligibility of narrowband speech without essentially lengthening the overall time duration of the signal. Both spectral enhancements and variable-rate...
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7016831 |
Voice code conversion apparatus
Disclosed is a voice code conversation apparatus to which voice code obtained by a first voice encoding method is input for converting this voice code to voice code of a second voice encoding...
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